Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4884665 | Automotive shock absorber with unitary striker plate and closure cap | William Parker, Thomas E. Bartos | 1989-12-05 |
| 4844179 | Drill string stabilizer | John Forrest, Rory McCrae Tulloch | 1989-07-04 |
| 4807708 | Directional drilling of a drill string | John Forrest, Roger John Catherall, Randall Pounds | 1989-02-28 |
| 4796704 | Drop ball sub-assembly for a down-hole device | John Forrest, Rory McCrae Tulloch | 1989-01-10 |